Telephone system



Nov. 2, 1943. DENTON ETAL. 2,333,474

TELEPHONE SYSTEM Filed Oct. 27, 1-941 l9 Sheets-Sheet l INVENTORS LAWRENCE DENTON HARRY G. EVERS BY MJW M m ATTORNEYS Ndv- 2, 1943- p L. lI )E NTON ETAL 2,333,474

TELEPHONE SYSTEM Filedotfzv, 1941 1e Sheets-Sheet 2 FIG. 2A

CONNECTOR 20 LAWRENCE DENTON BY HARRY G. EVERS ATTORNEYS Q Nov. 2, 1943. DENT-ON HAL l 2,333,474

' TELEPHONE SYSTEM' Filed Oct. 27, 1941 19 Sheets-Sheet 4 FIG. 3A

CONNECTOR 2O LAWRENCE DE By "HARRY sevens M, M M

ATTORNEYS 1943- L. DENTON ETAL I 2,333,474

TELEPHONE SYSTEM Filed Oct. 27, 1941 19 Sheets-Sheet 6 CONNECTOR 20 INVENTORS LAWRENCE DENTON BY HARRY G. EVERS I ATTORNEYS L. DENTON EIAL TELEPHONE SYSTEM Filed Oct. 27. 1941 Nov. 2, 1943.

PULSE CONTROLLED l9 Sheets-Sheet 7 HARRY G. EVERS ATTORNEYS Nov. 2, 1943. L DENTON ETAL 2,333,474

. TELEPHONE SYSTEM .Fileduoot 27, 1941 19 Sheets-Sheet 9 33 FIG.5B

CONTROL R530 INVENTORS. LAWRENCE neuron By HARRY sevens 7 A OBNEXS I log, 9

Nov. 2, 1943.

ITc

HATER L. DENTON ET AL TELEPHONE SYSTEM Filed Oct. 27, 1941 i9 Sheets-Sheet 12 TO FINDER I' LINE CIRCUIT PBX AUTOMATIC REPEATER DISTRIBUTOR START EXCHANGE INVENTORS LAWRENCE DENTON HARRY G. EVERS mm mm ATTORNEY Nov. 2, 1943. L DENTON ET AL I E v 2,333,474

TELEPHONE SYSTEM I Filed Oct. 27, 1941 v 19 Sheets-Sheet 16 FIG. u E 1 SERVICE R ESTRIGTING NETWORK 4O 7 2| Hm i W3 H55 k -ll63 INVENTORS .LAWRENCE DENTON Y HARRY .s EVERS MW,nfMJA-:7,W M ATTORNEYS TELEPHONE SYSTEM Filed 001;. 27, 1941 "19 Sheets-Sheet 17 SERVICE RESTRICTING NETWORK 40 ElFmo Rl250 ,cm? I ,cme @2 I260 I 12mg 7 BY HARRY G.EVER$ M fMV M M ATTORNEYS -N0v. v2, 1943. DENTQN ET AL 7 2,333,474

TELEPHONE SYSTEM Filed Oct. 27, 1941 19 Sheets-Sheet 18 F IG. 12B

(6 I226 rC|227 |27l\ 9 H i ssksso R @206 MAKE CONTACTS OF SWITCH THROUGH RE-LA/Y TO WINDING OF SWITCH THROUGH'RLY .LINK NO 2 INVENTORS LAWRENCE DENTON BY HARRY G. EVERS 'O W.fWJA ,M m ATTORNEYS Nov. 2, 1943.

L. DENTON ETAL TELEPHONE SYSTEM Filed 001;. 27, 1941 19 Sheets-Sheet l9 FIG. II

FIG I2A FIG I28 FIG. I

FIG. 8

FIG. 2A FIG. 3A FIG. 4A FIG. 5A FIG. GA FIG. 7

FIG. 9

FIG. 2B F|G.3B FIG; 4B FIG.5B FIG. 6a

FIG. I3

FIG. I4

INVENTORS LAWRENCE DENTON By HARRY e. EVERS ATTORNEYS- Patented Nov. 2, 1943 H is a assure TTEBER'HONE sx'srmm iawrence ljenton; Wheaten, Chicago; 111;, assfgnors' tfA11fi0matiqE1ectricj I e Laboratories: 1113;, a corfiotaitibn' fn laware 1 l isppii ahim oeiehei 27, 194i,\.s iia.1Nl-4msssia Y I month's; (o1. lf'ftj lsl" The presentinventitm relates 0 telephone systems and has feron'e efi its objects theprevision erimproved:apparatus feir impcsifig ser vite: re striations 'on certain er the subseriber lines terminafinzgeta teienhcfie exchanges v r l t is anefiiect e'f tfie presenfi inVntiomto' provide in a; eithe character-scanned; improved racemes to 'peeviemgdifferent elasse's efservice to subscribers t me pay' atdifferent rates for the servics'receiveel.

ri-coming te amines obiectat the invention, an improved and exceedingly fleit ibfe arranger'iien is-'1 Jrevid'edfor iinposing a ny-"eomhinat'ibn 0 5a plurality-ofdifierehfirestribtions on -the serv ice rem-levee any line cf the'syst'ezri'. accordance Wiiffi still another object of the invention the restrictions are imposed on any" particular linej'are'all eif'e ctfed" on a matched signal basis over control? paths wIiiEEiareindivid'u'al tie the lines" tum restricted s rviize etns which are metha e? teitfie dffi erent service-re s'trictions by signal [generatingequipment which is common to therliines The invention, 150th as to'its organization and method of operation; togeth r witf'rfurther objects and advantages thereuf, will best beunderstood by referenceto tllespecification taken in connection with the accompanying drawings; in

tral' exchange. Interwfice trunks are. used to provide communicationfacilities between the small community exchange and the oflices pro vided in the adjacent wager-cities.- Forexample, the automatic switching equipment oi the community exchange is illustrated as having access to the automatic exchange: 9 ever a group of trunks which includes the trunk l3. gimilar groups of trunks are provided which; extend between the community exchange and each of. the other central ofiices. order to; provide them; striated servicefa'cilities; referred to above,- twQ- groups of trunks: may be 'utltizedi to connect the illustrated; community-exchange withv "one of the distant central ofiices in which provided toll sWitkhwbOa-I'd facilities. The single illustrated inter-ofllce: trunk 13 is shown: as terminating-"in the community exchange in avrepeater I 8 which is aceessible to the links-01% the exchange through alinecircuitlhi I-Ihe subscriber lineseterminating at the communityiexchange mayi'comprise single part i' or private lines, metallic'multiparty lines atrangect for bridgedv ringing, full metallic: lines arranged for divfded ringing: amtv ground return lines; Theillustrated-line shown as be'ing of the singlenparty-type" ami i's arranged? to serve only the substation! fi which may-"beeither a; pri-vatesubstatiefi or a'zpaystaltiom Ilhisfline tersupervisory sigminates in the community exchange a line circuit M which of tlfie i form disclosed: and claimed-in? PatetxtNmr2g19934 grantedi May 7 19420, Pier Bakker, includes a mechanical-Hy interlocked l-ine' 'reialy' R and: 'cufi-o'fl relay Rtkik- -A second subscriherlinefi of the ground return type 'illnstiated 'asl fiefiriinatii'lg' in) the communityexcha'ngeiin arline' circuit 1 andvmay be arranged "ta serve any desired-umber of substat-ions addition! to that illustvaited substation D. 'Avthird 'line H siilu stratedzin Fign 'l of the drawings a's'b'eing tithe muIti' party-"typearranged to 'serve :the'two substations B and C.- Thisline terminates in the community exchange in a line circuit 1'5.v .Thelines extending" to the line terminals (if the links the} commnnity exchange may also include one ormoi e groups of branch exchange trunks. "One such F2- is illustratedask "terminating in'fth come-mew exchange the line circuit "t6 and as extending to the switchhoardffof a' private branch exchange 8 This linei-rcuit theme amulet; the line circuit t5; 'the line zcircuit W, and'th'e line circuits terminatmg the other rimes: extendmg 66' the commufiity exchange, are each identical with the llne circuit Mrdescrilfleds'abeire. 1 Thus; the ine cireuit 1 1s illustratedas cofimrisingf a mechanically v interldckew'line may R am are oh relay Rl fitlt 117 18"? noted, hcweverjtnaf; the charactenof the wiring; used in the difierefi't line circuits may differ slightly depending upon tner types-of lines Whichare respectively tenniiraftd-tfiereby;

i The automatic switchingr equiprrient jtiovided in the exchange forsettifig up "connections be tween the: various? imesitemm'atmg whereas: co'i'nprises a. lum-my of- 'find'er-cenueeter links each having ai'capacity' out one hmidred Pines.- Que such' 

